9135791440 has 40 divisors (see below), whose sum is σ = 21244968360. Its totient is φ = 3653584896.

The previous prime is 9135791417. The next prime is 9135791443. The reversal of 9135791440 is 441975319.

It can be written as a sum of positive squares in 4 ways, for example, as 5412839184 + 3722952256 = 73572^2 + 61016^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9135791443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581772 + ... + 597268.

It is an arithmetic number, because the mean of its divisors is an integer number (531124209).

Almost surely, 2^9135791440 is an apocalyptic number.

It is an amenable number.

9135791440 is an abundant number, since it is smaller than the sum of its proper divisors (12109176920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9135791440 is a wasteful number, since it uses less digits than its factorization.

9135791440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22879 (or 22873 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 9135791440 is about 95581.3341610170. The cubic root of 9135791440 is about 2090.4930378371.

The spelling of 9135791440 in words is "nine billion, one hundred thirty-five million, seven hundred ninety-one thousand, four hundred forty".